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Generation of Signals using MATLAB/Python

Generation of Signals using MATLAB/Python Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally What You will Learn You will learn about various energy signals and their generation using MATLAB and python. Signal Generation using MATLAB MATLAB arrays are used to generate finite energy signals. It should be understood that the signals so generated are discrete in time and amplitude. Sinusoidal Signal Consider the sinusoidal signal $x=sin(t)$, which is nothing but a single tone, with the help of the MATLAB code below. t=linspace(0,10,5000); x=sin(t); plot(t,x); grid; The execution of the code will result in the signal, shown below. Amplitude Modulated Signal The above low frequency tone is used to modulate a sinusoidal carrier $y$ of ten times the original frequency. i.e. $y=sin(10t)$. The amplitude modulated signal $am(t)$ is obtained as \begin{equation} am(t)=x*y+y \end{equation}Su
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Tools for Scientific Computing - MATLAB and Python

Tools for Scientific Computing - MATLAB and Python Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally What You will Learn You will learn the needs for and the requirements in scientific computing. You will learn the basics of MATLAB and Python and make a comparative study. You will learn to use freemat to interpret MATLAB codes. You will do some basic coding in MATLAB and Python. Overview Computers are incredibly powerful systems that facilitate the many walks of human life. In working with computers, it is imperative to know how to talk them into doing useful things. There is a plethora of programming languages such as C, C++, PHP etc. that serve this purpose. But when it comes to prompting a computer to do scientific computing tasks, there are very few languages with desirable features such as FORTRAN , Ruby, Python etc. This post presents the scientific computing requirements the d
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Binary Adder Circuits

Binary Adder Circuits Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally What You will Learn You will understand the theory of binary addition using half adders and full adders. You will learn to realize parallel adder on the simulator. Objectives The task is to build half adder and full adder circuits with logic gates both on Qucs and to verify their truth tables. To develop a four bit adder using Qucs and to perform binary addition with it. Half Adder Circuits Half adder receives two input bits ($X_n$ and $Y_n$) and produces the sum of the two ($S_n$) and the carry output ($C_n$). It does not add the carry from the previous stage and hence By the inspection of the truth table of half adder in the table below. Truth table of a half adder $X_n$ $Y_n$ $S_n$ $C_n$ $0$ $0$ $0$ $0$ $0$ $1$ $1$
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RC Coupled Amplifier

RC Coupled Amplifier Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally What You will Learn You will understand the design of RC coupled amplifier. You will appreciate its frequency response and understand the variation of voltage gain at low and high frequencies. You will understand the effect of emitter bypass capacitor (or rather the effect of current series negative feedback) on the voltage gain and frequency response of the amplifier. You will understand the concept of stability of amplifier by analyzing the Nyquist plot and understand how negative feedback improves the stability. Objectives To design and implement RC coupled amplifier and to observe voltage amplification both in Qucs and on breadboard. To plot its frequency response curve and to compute the bandwidth with and without feedback. Design Let $V_{CC}=15V$, $\beta=200$ and $I_{C}=5mA$. For active region
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Output Characteristics of n - Channel MOSFET

Output Characteristics of n - Channel MOSFET Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally Objectives To plot the output characteristics of n- channel MOSFET. To compute the drain resistance Experiment Output characteristics indicate the variation of the drain current ($I_{D}$) with the drain to source voltage ($V_{DS}$) for different gate to source voltages ($V_{GS}$). Wire up the ciruit in QUCS schematic editor as shown below. Run the simulations and observe the output characteristics as shown below. Select a characteristics and draw a tangent in the saturation region and compute the drain resistance as \begin{equation} r_{d}=\frac{\Delta V_{DS}}{\Delta I_{D}} \end{equation} for the given $V_{GS}$ Observations Drain resistance = $\ldots\ldots\ldots\ldots\ldots\ldots\ldots\ldots\,\Omega$ What You Learned You understood the output characteristics of $n
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Common Base Transistor Characteristics

Common Base Transistor Characteristics Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally What You will Learn You will learn the operation of common base transistor stage. You will learn the experimental set up for plotting the current voltage characteristics at the input and output of a CB stage. You will learn to find out the common base short circuit current gain ($\alpha$), the input impedance ($r_{i}$) and output impedance ($r_{o}$) Theory The collector current of an actively biased CB (meaning that base is at ac ground) transistor, in terms of the emitter current and reverse saturation current is \begin{equation} I_{C}=-\alpha I_{E}+I_{CO} \end{equation} where $\alpha$ is the common base short circuit current gain. The short circuit current gain in the common emitter configuration. Input characteristics are plots of input current ($I_E$) vs. the input voltage ($V_{EB}$) for different
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Common Emitter Transistor Characteristics

Common Emitter Transistor Characteristics Dr. Hari V S Department of Electronics and Communication College of Engineering Karunagappally What You will Learn You will learn the theory of common emitter transistor configuration and the corresponding collector current equation. You will understand the common emitter short circuit current gain ($\beta$). You will learn the input and output characteristics of common emitter BJT. You will understand the experimental set up for plotting the characteristics and draw the characteristics. Objectives To plot the input and output characteristics of common emitter BJT. To compute the short circuit current gain ($\beta$), input impedance ($r_{i}$) and output impedance ($r_{o}$). Theory The collector current of an actively biased CE (meaning that emitter is at ac ground) transistor, in terms of the emitter current and reverse saturation current is \
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